Thomas wallwortet



PATENTE@ min! af( -plates or @multiplier-s, and= A@gleiten 'igiene' lelmt @ff-111:2.

THOMAS Wismvonru', or NEWTQN HEATH, GREAT' BRiTAIN.

Lettere Patent 74,641, dated February 18, 1868; antedateci'-1'ebruary 1,4, 1868.

tro' ALL WHoM IT'MAY CONCERNE Be it known that I, T; WALLWBH, oi Newton Heath, Lancaster countj","Kingdom-Great yBritain and Ireland, have nventedcertain Improvements in MachineI'yor Apparatus forComputingL or'AReelron-ing 'Quantities andAmounts' and I do'h'eeby declare the following to -be a full, clear,` and enact description of the saine', reference being had to-the'accompanying drawing, and.` ,to the lettersfof reference marked thereon.

The invention is designed for .thel purpose of Aindicating and showing the products arising from Athe mul'- tiplication of any. two` sets of numerals-together for'which the tables and instrument .may be arranged.

The apparatusfconsists ofaldislr,` enclosed between two -outer-plates, andl'mounted ou a central shaft orA axis, at each end of which al finger or pointer and ahandlenre secured,by whichthe fingers are turned to point to any.multiplying-numerals; audwhi'ch also turnftheinternal disk. Iny the outer plate are two slots,r,made fromvtlefperiphery'towards thecentre, down-one side of each of which slots arefmrked the fmultiplicandsf o r numbers-to b'e multiplied,- and round the outer-edge of each of these 'plates the multipliersf are arranged; 0n both faces of the 4.inter-nal disk oolumns'fof numerals are marked, which ,have been-previouslycalculated vandgascertained, and which 'represent 4the product of multiplication between' the lnumerals on the edgeof -the trned @",my umultiplier. on tl1e edge of.- the'plate, the disk is also tn'l'ned'and'the product appears'through the slot opposite to-.themu'ltiplicaud ou the side of the sl'o't. A I

This combination *and'arrangement of apparatus maybe mounted on a vertical spindle, so as to turn round to read both sides, and a series-of the dials and-plates maybe.arranged behind each other, and adapted and calculated for weights, measures, money, interest, or other tables, and wher'e'a series are employed, each apparatusmay be made .to fall into ahorizontal position to clear the otherialiia that both sides may be legible by.

supporting the'spi'gdles on`pivot's, and making u.l slot in the framing. I In order that the invention may' be .better understood a'nd explained in detail, I have hereunto attacheda sheet of drawings, having letters -of reference/marked-thereupon.

Figure 1 represents a fontelevation of the apparatus fox-ascertaining and indicating the product or amount arising from the multiplication of any two sets of numerals together. This riew also shows the arrangement and position of the aperture in thea'outer plate or4 cover throughwhichone line oriseries of numerals appears,

the numerals down "the,slotsormultiplicand.;. thus,vwhenone of the'pointers 'is'4 which are marked and arranged on the internal wheel-or disk, und which represent the products of the numerals on the edge o'f the aperture, and on the outer plate, multipliedby eachother. I

' Figure 2 represents the internal disk detached, the arrangement oflthe numerals being. partly shown in radial lines.

Figure 3 represents a vertical section of the apparatus. Figure 4 lrepresents 4the front elevation of a similar apparatus,arranged-.in sets of four o'r more, in order that amounts-or products in money, interest., weight, or measure, may be ascertainedfand indicated, each disl-` being only calculated and arranged' in accordance; and the amount may be ascertained from any particular disk by causing such disk to assume the horizontal position shown.

FigureV 5 represents a side eleviition of a number-of disks arranged for 'the aforesaid purpose.

In )figs-- 1, 2, 3, 4, and 5, a g1 is the stand or support of'the plates and disks,' in which such plates and disks.

may be arranged to indicate on both sideshand tur ned u on the shaft or axis a.' as seen in frfl oran one 7 c y i of -the numbers, `as-seen in figs. 4 and 5 may be withdrawn 'from the stand and caused to assume a. horizontal position. In the outer platesb b, which enclose the internal disk, slots or openings e 'c are formed, which extend from the periphery towards the 'centre- Down one-side, d, of Aeach of'thes slots, are marked' the multiplicand" numbers to be multiplied, and round the outer ,edge of each of these plates tliez On both faces of the internal d'isk,.columns of numerals which have been previousl which representthe product of multiplication between the numerals on the edge of and' the numerals down the sides of the apertures or multipliounds. multiplier on the edge of the plate, the internal disk is also turned the numerals which appear. through the openin product of the multiplication of one of the othe multipliers are arranged;

thcl platesor. multipliers Thus, when the pointer e isturned to any being mounted onrthe same shaft, f, and gopposite to orvin line with eachAmult-iplicaud representtho r. Forv instance, if'a'n article is six and one-half pence n pound,

y calculated, are marked,A

(which rate is indicatedA on the 'scale 01,) the cost of tufo pounds will befound by turning the'pnter @to the figure 2, whenthe figures 1f (indicating one shi lling ene penny)'w1l appear'through the opening c,- opposite the number 6% on the scale d. In like manner, by turning the pointer to the iig* @6, the cost of six pounds- (,tl1ree Shilling three pence) will be hroughtopposite the .number 6. When the fractionsvv in the multiplicand are stated in quarters instead of halves, the 'disk is turned so as to expose the graduations on the opposite side. Itwill be apparent that when a different system of leuireney is employed the graduatons must be altered.

`I claim as my invention, and desire to secure by Letters Patenti A plate, l, with an opening, c, and with graduations at its edges and at the edges of the opening, in combination with a graduated revoivin and turning with the disk, the wh In testimony whereof, I have Witnesses.`

ole being constructed, arrange'd,and operating substantialiy as described.-

T. WALILWORTH. Witnesses J ons. L. Davms,

JN0. Hunan.

g disk, having figures arranged in radial rows, arid with a pointer secured tohereunto signed my name to this specification in the presence of two subscribing 

